Not sure if this is a bug, but in the files and release notes of v.95 there is a M14 marksman rifle. But in game the M14 is shown as a M21 in the label of the gun. The label that you see when you scroll through your weapons.

The m21 is the version of the m14 converted for sniping and marksmen duties. On retrospect in the changelog they may be talking about the m14 DMR which is another converted version of the m14 used by the USMC.